Now that's smart: Coupling innovation set to save £240k

17/04/2018
Chris Ames

A manufacturer has given details of how its coupling innovation saved a Highways England Smart Motorway project three to five hours per pipe connection and is set to save nearly a quarter of a million pounds.

A contractor had started a major Smart Motorway project on the M6 between junctions 16 and 19. Part of the critical path for the project involved extensive works to the motorway’s existing drainage network, including the addition of new drainage sections.

The original drainage network for this section of the M6 was installed in 1963 and contractors working on the project came across several outdated methods when digging up the old pipelines.

For example, in most cases, pipes had been encased in concrete, causing significant problems when new sections were required or the old pipes needed connecting into new manholes and catchpit chambers. Contractors had been breaking away the concrete by hand to expose the external surface of the pipes to connect a traditional coupling. (pictured below)

 

 

However, the combination of the extremely old and therefore hard concrete and brittleness of the old clay pipes meant that the pipe would often break after hours of hard labour, meaning the contractor would need to chase back the concrete even further down the line. The outlook for this method was project delays and project overspend.

After hearing about the problem, UK-based flexible coupling manufacturer Flexseal suggested using its range of Icon Internal Couplings, which are designed to connect to the internal surfaces of two pipes to make a secure and watertight connection.

The contractors made a clean cut through the concrete and old pipe using a Stihl Saw instead of excavating the concrete surround, inserted the coupling into the bore of the existing clay pipe, inserted the new pipe onto the opposite end of the coupling and tightened to the correct torque. (See picture below)

 

 

The project is ongoing. To date 363 Icon Couplings have been purchased for it and it was originally anticipated that 400 will be used, which would mean cost savings of approximately £240,000.

Project benefits:

  • Reduction of installation time from four to six hours using traditional methods to just one hour using the Icon Coupling
  • Health & Safety risks were reduced, with requirements for concrete excavation eliminated
  • Planning improvements for future projects identified as the Icon ensures a near certain design can be achieved and unexpected problem pipe have less impact on the project
  • Savings of each connection on average £600
  • Product approved by Highways England and endorsed as best practice for this scenario on future projects
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